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| The Facial Nerve (CN7) |
| The bony canal containing the facial nerve can be followed on axial and coronal CT images. This section provides a basic approach for identifying and tracing the course of the facial nerve through the temporal bone. |
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| Posterior Genu |
 The posterior genu marks the transition between mastoid and tympanic segments.
Note the relationship of the facial nerve to the pyramidal eminence and sinus tympani.
A lesion involving the sinus tympani requires a retrofacial/posterior surgical approach.
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